Fo Audio Research Ref 10 owners, Best Amp?

What amp did you find worked best with this pre amp?

Did it depend on wattage? I am currently using 250 per channel.

Do I need more?

Or is it the synergy with a certain amp?

I know I am not getting all the potential of this pre. Something is holding it back.

And I know my system is capable of so much more. The problem is I had auditioned somebody's ref 10 and it sounded miraculous. The walls of my apartment disappeared and I wanted to listen to all of my many many cds again. It got difficult just leaving to do the things I needed to do. Ever feel that way with your system?

The kicker is I don't remember which amp I was using! I was trying out many amps and not keeping notes. It was a long time ago. Everything else is exactly the same-transprt, Dac, Speakers. 

If any of you are so inclined let me know what amp you found goes best with your ref 10 and let me know if you've found that nirvana I ever so briefly enjoyed.

Thank you for your time.